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Module 9 AP Psych
Module 9 AP Psych Unit 2
Term | Definition |
---|---|
Franz Gall and Phrenology | He proposed that phrenology could reveal a person’s underlying brain size and associated mental abilities and character traits |
Localization of function | this is the idea that various brain regions have functions |
Biopsychosocial systems | we are a system composed of subsystems that ae in turn composed of even smaller subsystems |
Neuron | A nerve cell; the basic building block of the nervous system |
dendrites | A neurons often bushy branching extensions that receive and integrate messages |
Cell body | A part of a neuron that contains the nucleus |
Axon | The neuron extension that passes messages through its branches to other neurons or to muscles or glands |
Myelin Sheath | A fatty tissue layer segmentally encasing the axons of some neurons |
Glial cells | Cells in the nervous system that support, nourish, and protect neurons |
Synapse | A junction between the axon tip of the sending neuron |
Action Potential | A neural impulse |
Threshold | The level of stimulation required to trigger a neural impulse |
Refractory period | A brief resting pause that occurs after a neuron has been fired |
All-or-none response | A neurons reaction of either firing or not firing |
Reuptake | A neurotransmitters re absorption by the sending neuron |
Neurotransmitters | The chemical messengers that cross synaptic gaps between neurons |
Acetylcholine (Ach) | This enables muscle action, learning, and memory |
Dopamine | This influences movement, learning, attention, and emotion |
Serotonin | This affects mood, hunger, sleep and arousal |
Norepinephrine | This helps control alertness and arousal |
GABA | This is a major inhibitory neurotransmitter |
Glutamate | This is a major excitatory neurotransmitter involved in memory |
Endorphins | Neurotransmitters that influence the perception of pain of pleasure |
Agonists | This is a molecule that increases a neurotransmitters action |
Antagonists | This is a molecule that inhabits or blocks a neurotransmitters action |